Mangroo tried to resuscitate the boy and called 911, but he was pronounced dead Wednesday at East Pasco Medical Center in Zephyrhills. The twin girl was still being evaluated at the hospital late Thursday, the Tampa Tribune reported in its Friday editions.

The Pasco Sheriff's office is investigating the parents and the rest of the people in the home when the baby was discovered dead.

''Of course, they immediately thought we did this,'' Mangroo said, referring to he and his wife.

Records show Mangroo, 31, was arrested in 1997 by Hillsborough sheriff's deputies and charged with aggravated battery. But that charge was dropped and Morales, 30, has no criminal history in Florida.

Sheriff's officials are not releasing any information.

''It's a suspicious death and there was trauma to the baby's body,'' sheriff's spokesman Kevin Doll said. ''That's all we are saying right now.''

Investigators are questioning all of the people who were at the house Wednesday. That includes Mangroo, Morales and their 3-year-old daughter Seeta. Also in the home were Morales' sons, 12-year-old Jose Ferrer and 6-year-old Augustin Jimenez, and Morales' brother and her 4 and 5-year-old nephews.

''I know Maria didn't hurt her child. You couldn't ask for a better mother,'' Mangroo said. ''And I know I didn't do it. Why would I hurt my only son?''